Heffer, full name Heffer Wolfe, was a native of O-Town. While never actually meeting members of the stranded USS Voyager away team, the team did rescue him from captivity from a mysterious schnitzel worshiping cult. (Star Trek: Voyager - Dark Realm)
Heffer was originally discovered by a family of anthromorphic wolves as an abandoned calf. Originally the family was going to fatten him up to eat him, but they grew to love him as one of their own.
An adventurous soul with a large appetite, Heffer was unafraid to experiment with things. This lack of fear, however, tended to stem from stupidity rather than genuine bravery. This particular trait would wind up getting him into trouble in his early twenties when he fell under the sway of a mysterious schnitzel worshiping cult.(Rocko's Modern Life).